As a followup on the above, there is more information about the fallacy of making so much of that "political expression" statement by the FCCC (Federal Council of the Churches of Christ) that was already discussed here several years ago: https://www.jehovahs-witness.com/topic/17563/fccc-league-on-nations-un-watchtower-rare-article?size=20&page=1 There were pictures of the original FCCC source material in those posts. The links to the actual source material do not show up any more on that thread (it's 15 years old). The same resource pages can be found here: https://books.google.com/books?id=lEVQAQAAMAAJ
The book is called: Federal Council Bulletin: A Journal of Religious Co-operation and Inter-church Activities, Volumes 1-3. The quote(s) in question are found on page 12 of Volume 2 (1919), especially at the end of the fourth paragraph under Declarations. (The book starts out with 1918, and the page numbering starts over for 1919 and 1920.) Note that similar sentiments can be found in that book as early as January 1918.
That thread points out that the most serious problem with the Watch Tower’s claim is that the WTS doesn’t seem to realize or admit that this publication of the Federal Council of Churches of Christ was speaking about what the League “should be” not what it was. They were speaking of an “ideal.” They were not promoting “worship” any more than the Watchtower itself was in the article they published the following month with similar sentiments. Also, this declaration about the proposed League only represented a small number of Protestant churches although it was presented as representing all of Christendom, Protestant and Catholic. The statement itself was evidently an invention of the executive committee of the FCCC.
I just noticed from another search on "League of Nations" that "sf" (skally) had already posted Carl Jonsson's article for discussion here: https://www.jehovahs-witness.com/topic/14143/league-united-nations-prophetic-speculation and the support of the UN (League) in 1919 was also discussed here: https://www.jehovahs-witness.com/topic/12890/wt-supported-un-1919-wt by "Messenger". In that thread "Satanus" also drew a parallel to Rutherford's compromising 1933 Declaration (and the letter to Hitler) where the Declaration said:
“Instead of being against the principles advocated by the government of Germany, we stand squarely for such principles, and point out that Jehovah God through Christ Jesus will bring about the full realization of these principles.”
In other words, the German Nazi ideals, while not the equivalent of the kingdom of God, were at least a human, ‘political expression’ of the same principles as the kingdom of God. In the “Letter to Hitler” the same idea:
“To the contrary, referring to the purely religious and unpolitical goals and efforts of the [Bible Students], it can be said that these are in full agreement with the identical goals of the national government of the German Reich.”
Doing a bit more reading about the League, I noticed that it really turns out to be very awkward for the WTS (and others religions, too) to make application between the League and the beast of Revelation 17:8. I had never really read about the IPU before (League's predecessor) and its history reminded me even more of how silly the whole prophetic application is.
Whether or not such an organization as the League of Nations actually fits the ideas of Revelation 17:8 is a much more basic question that JWs rarely, if ever, would ask themselves. A good summary of the history of the League of Nations can be found on Wikipedia. https://en.wikipedia.org/wiki/League_of_Nations . Note that while the League was formally founded on January 10, 1920, it was being organized and defined from the very beginning of World War I. As of late 1917 and early 1918 the form it would take was directly anticipated with U.S. involvement and promotion by President Woodrow Wilson. Also note that the League basically inherited the organizations and structure of one of the previous attempts to create such an entity, the IPU or Inter-Parliamentary Union, the League’s forerunner. (see https://en.wikipedia.org/wiki/Inter-Parliamentary_Union )
The IPU is of interest from another perspective, too. The Watch Tower publications have made a lot over the idea that the League “died” and came to life again after WWII as the United Nations. The problem is that could be said of a lot of organizations whose primary aim was to promote peace. How astonishing would it be that a generally “pacifist” leaning organization might temporarily disappear during a large war? The IPU was, of course, a relatively neutral and pacifist organization, too, and the book Neutrality in Twentieth Century Europe, p. 298 explains this and adds: “The outbreak of the First World War prevented further action, and during the war most of the IPU’s work was seriously hampered.” (Although effectively replaced by the League of Nations after the war, the IPU resumed full operations and continues to this day.) For that matter, something similar happened to the Watch Tower Society itself because of the same war.
So if it happened to the League’s “predecessor,” then how appropriate is it to say that the world would be amazed that an organization attempting neutrality and peace might disappear for a while?
If others (see Jonsson's article) could predict the demise of the League after failing in its agenda during WWII (just as the IPU had failed to keep peace in WWI) then it really was not astonishing at all, and for this reason the League of Nations does not fit Revelation 17:8.
A more salient point is this: The Bible often represents nations as beasts. It might be true that an international organization could act in a vicious, inhumane, beastly manner, similar to some individual nations. But how logical is it to depict an organization that tries to promote political neutrality, peace and goodwill as a beast? When the war came, did anyone expect the League of Nations to put up a vicious, beastly fight to stay in power? Was there really something so astonishing and amazing about its temporary disappearance and reappearance when the war was over? If it reappeared as the United Nations, has that entity really shown itself to be a vicious beast?
P.S. It's also "funny" that the WTS likes to use the term "worship" for how Christendom (especially) is supposedly blasphemously treating this beast as the only hope for peace. Yet it's somehow inappropriate for Christians to use the same term "worship" for how they view Jesus.